North Shore MP Maggie Barry today announced she will not be seeking re-election and will retire from Parliament in 2020.

The former TV presenter has had held the North Shore seat for three terms.

Barry's departure means National will need to find a new candidate for the North Shore electorate - one of the safest National seats in the country.

"It has been an honour to serve the people of the North Shore for three terms and to have been part of such a talented National Party caucus," she said in a statement this morning.

"Making the decision to leave wasn't easy, but after an extraordinary 10 years in politics the time is now right for my husband Grant Kerr and I to spend more time overseas with our London based family and share some adventures - we have a bucket list as long as your arm."

National leader Simon Bridges thanked Barry for her service.

"She has been a valued colleague and friend. We know Maggie will continue to support us throughout the campaign."

He said she has been a great representative for the people of North Shore and a valuable member of the National Party caucus.

Bridges said: "We are brimming with talent and I have no doubt that we will see a vigorous contest for the North Shore seat."